Boiler



5 Sheets-Sheevt l INVENTOR. Jesse MarimJz: Q/rzrbm 7 PW ATTORNEYJ Sept. 23, 19311 J. c. MARTIN. JR

BOILER Filed April 25; 192s Sept. 23.1930.

J.. c. MARTIN.' JR

BOILER Filed April 25. 1928N '5 Sheets-Sheet 3 INVENTOR. Jsse 6. Martin, Jr. @fram-4, r 5,24%;

A TTORNEY` Sept. 23, 930 J. c, MARTIN. JR

BOILER Filed April 25, 192B 5 Sheets-Sheet 4 \km. y R. .m I O n m a e a w M a. .R a m A TTORNEY' Sept. 23, 1930. .1. c. MARTIN. .m

BILEI Filed April 25, 192B 5 Sheets-Sheet 5 INVENTOR. Jesse C. Martin, J1: BY @m2-MA., 7%@

ATTORNEYS Patented Sept. 23, 1930 PATENT OFFICE JESSE C. MARTIN, JR., F LOS ANGELES, CALIFORNIA BOILER Application filed April 25, 1928.

The invention relates to boilers with particular adaptability to locomotive boilers of the fuel injected burner type and has as an object the improvement of the invention disclosed and claimed in my Patent- No.

1,663.806, dated March 27, 1928.

lt is an object of the invention to provide a boiler having a firebox provided with water bottoms forming in effect extensions of the side water legs of the tirebox and forming water circulating and steam generating surfaces in the bottom of the fireboX, having means to introduce water into said water bottom communicating with portions of the tircboX as distinguished from the barrel of tho boiler as disclosed but not specifically claimed in my former patent referred to.

lt is a further object of the invention to provide water bottoms for a locomotive firebox which may be installed in a locomotive without disturbing parts of the locomotive in advance of the fireboX.

It is a further object of the invention to provide a, water bottom or Water bottoms for f a` locomotive lireboX of the type referred to which may be applied to existing locomotives and is particularly adapted to be applied to locomotives of the coal burning type to change them over into injector' burner locomotives in such a manner that the coal burning characteristics of the locomotive may be restored.

lt is a further object of the invention to provide a device of the class referred to wherein the conduits for circulating water from the boiler to the water bottoms provided by the invention may be installed with a minimum of conflict with the structure of the locomotive such as spring equalizers, running gear and the like.

It is a further object of the preferred form of the present invention to provide a lirebox having water bottoms in which the conduits conveying water to the water bottoms communicate with the water legs of the firebox.

It is a further object of the invention to provide a firebox securing the maximum of circulation in the side water legs of the firebox and at the same time increasing to a substantial degree the heating surface of the Serial No. 272,762.

firebox and reduciuef the expense of refractory lining of the firebox which lining surfaces have heretofore been a source of heat losses.

It is a further object of the invention to provide a locomotive firebox of the type referred to wherein the entire structure of the firebox is heated much more uniformly than has heretofore been the case thereby reducing the destructive effects of uneven eXpansion.

Further objects of the invention will appear from the following description when read in connection with the accompanying drawings showing illustrative embodiments of the invention and wherein Figure 1 is a horizontal section through a. firebox showing the invention applied thereto in plan View, the refractory lining being omitted;

Fig. 2 is a detail vertical section on line 2-2 of Fig. 1 showing the refractories in place;

Fig. 3 a detail vertical transverse Section on line 3 3 of Fig. 1 upon a slightly enlarocd scalo;

Fig. 4 is a detail central vertical section of a modified form of the invention;

Fig. 5 is a vertical transverse section on line 5 5 of Fig. 4;

Fig. 6 is a plan view corresponding to Fig. 1 of a further modification;

Fig. 7 is a vertical transverse section on line r1-7 of Fig. 6 upon an enlarged scale;

Fig. 8 is a vertical longitudinal section on line 8--8 of1 `ig. 6;

Fig. 9 is a detail vertical section correspending to a portion of Fig. 8 of a further modification;

Fig. 10 is a section corresponding to Fig. 4 of an additional modification. and

Fig. 11 is a detail vertical transverse section on line 11-11 of Fig. 10 upon an enlarged scale.

Figures 1 to 3 inclusive illustrate the form of the invention which is at present preferred and as there shown the device comprises a firebox having side water legs 12, 13 enclosed between outside side sheets 14, 15 and inside side sheets 16, 17, and a front water leg 18 enclosed between inside throat sheet 19 and outside throat sheet 20. The usual mud ring 21 is shown closing the water legs at their lower portion.

ln accordance with the form of the invention shown in Figures 1 to 3, separate water bottoms 22, 23 are shown, each comprising an upper wall 24 and a lower wall 25 joined by stay bolts 26 in a manner understood in boiler practice. The water bottoms are shown as terminated short of the ends of the firebox at both ends, the front ends of the water bottoms being spaced a considerably greater distance from the front water leg 18 than are the rear ends thereof from the rear of the fireboX. The space in front of the water bottoms is shown as closed by means of the refractory lining 27 supported by a metallic plate 28 and the housing 29 is shown through which a fuel injected burner 30 is adapted to inject fuel for heating of the lirebox, the space about the burner housing being closed by a refractory burner wall 31. The space between the lower edges of the water bottoms is also shown as closed by a refractory lining 32 supported by a metallic plate 33. Slings 34 and 35 or other equivalent supports under the water bottoms may be employed if desired.

To admit air for combustion. there is shown a box 36 opening through the lining 32 in the bottom of the tirebox.

The water bottoms in this form of the iuvention are shown as formed with an upwardly convex curvature terminating in flanges Si, 38 which may be ,secured as by welding to the inside side sheets 1o, 17 of the tireboX, and the water bottoms are shown as terminating downwardly in cylindrical or bulbous portions 3E) after the manner shown in my former patent, the evliudrical portions 3&3 terminating l'oiwvardly in flanged [ittings 40. 4l. and rearwardly in llanged fittings 42. 43. the latter of which may he provided with blow-olii connections not shown.

'the weld line above referred to is cated at 44 in Figure 2.

'l`o admit water to the water bottoms. there are shown conduits 115. d6 connected to the flanged fittings 4h, 41 and by means of other tittings 4i". 4S, are connected to tittings 4t), 5t), opening in this form of the invention through the inside side sheet s ot' the side water legs of the lirebox closely adjacent the mud ring 21 and in advance of the communication of the water bottoms with the said side water legs.

As shown. the ends of the water bottoms are closed by curving inwardly the side walls 24e. 25 of the water bottoms and joining the approaching edges of these walls at the front and rear and medial line of the water bottoms. the end wall just formed merging into a flange at 51 for attachment to the `side sheet.

lf desired, the flange 51 may be extended into a plate a sutlicient length to carry the indi- .ittings 4t), 5() in which event the welded line of Figure 2 would be extended upon the line 52 and from the end of this welded line would be extended downwardly upon the line 53 to form an extension of the lower flange 38 of the opening into the water bottom.

then it is desired to apply the invention to an existing locomotive, as for instance ol the coal burner type. the entire lower closure including the grate and ash pan of the locomotive is removed, an appropriate portion of the inside side sheets of the side water legs is cut out by an electric or oxyacetylene torch when the water bottom is placed and the edge of the flange 37 is welded to the edge of the opening in the, side sheet and the flange Et is attached to the mud ring. lf the struc,- ture ready for application to the locomotive includes the extension of flange 51 above referred to then the cut out opening would extend along lines 44 53 when the device of the invention may be applied as a whole in the manner above referred to.

vhen so applied, the portion of the side water legs below the refractory lining 2T of the combustion chamber in the front portion of the tirebox will be at a lower temperature than the remainder of the water legs so that the water in the side water legs will flow downwardly into the conduits 45. L16 thus to the water bottoms, which being heated will provide an upward circulation into the side water legs in the rear of the portions in communication with such conduits and the resnltant circulation will prevent accumulation of sediment upon the mud ring. any settlenient of sediment oc 1-urring in the cylindrical portions 239 of the water bottoms from which it may be blown ott' through the blow-ott means referred to.

ln the form of the invention shown in Figures 4 and 5, the conduits 45 4h are shown as extending outwardly below the mud ring 21 and in communi ration with fittings 5l. 55 welded about openings in the outside side sheets il, Vl5, this form of the invention being otherwise similar to that shown in Figures l to 1% inclusive.

In Figures 6 and 7 the water bottoms 22, 23 are similar to those shown in the figures already described with the exception that they are shown with greater lateral extent to provide space therebetween with a rcsultiug increase of heating surface and the flanged fittings 40. 41 are shown as having conduits 56. 57 connected to flanged fittings 59, 59, opening through the throat sheet 19 of the front water leg 1S of the tirebox.

As indicated in Figure S, the conduits 56, 57 a re provided with a relatively sharp bend at ti() whereby unequal expansion between the side water legs of the boiler and the lower edges of the water bottom and conduits may be compensated for by spring in the material of the conduits.

In the form of the invention shown in Figure 9, the conduit 57 is shown as extending below the forward transverse extension of the mud ring 21 and by virUue of reverse bend (il is brought into position whereby its flanged sheet may be connected to a flanged itting (33 opening through the outside throat Sheet (ifi.

ln Figures l() and ll, a modified form of water bottom is shown wherein the entire bottom of the tirebox is formed of a water bottom in one compartment having a lower horizontal portion ($5 shown as formed at its front and with a pair of flanged littiugs 66, 67 communicating with conduit 68. GS) in communication with the inside throat sheet above the niud ring 2l.

lt will be understood that this form of water bottom may equally well be placed in communication with side water legs in the manner shown in Figures l to El inclusive. In this form of the invention the water enterinzi; the common central portion ('35 of the vater bottom through the two conduits will provide two streams of enclosed water which will impinge against each other and will separate to go up the two sides Tt). Tl of the water bottom into the side water legs, this form of the invention being shown as provided with a flanged tittiug TQ at its rear end to which a blow-olf fitting or littings may be applied.

If desired. a single conduit maybe utilized to replace the two conduits 68, 6.() and still secure the advantages of the invention.

In the form of my invention of the former patent referred to. it is found necessary to remove a portion of the lire tubes of the boiler to secure access to the interior thereof in order to place a reinforcing sheet about the opening of the fitting whereby the couduits were attached to the barrel of the boiler to return water to the water bottoms. The form of the invention as disclosed herein removes this necessityv as the entire procedure to apply the invention to existing locomotives involves only the structure of the firebox itself and since there is no conduit to be placed extending beneath and parallel with the barrel ole the boiler. there is no conflict with the under structure present below the barrel, thus clearly facilitating the installation and still securing tbe advantages of the invention claimed in in v former patent.

The curvature of the water bottoms has a number of advantages over the tlat bottoms shown in my prior patent above referred to. among which are the following: The arch form better resists sagging of the plates when heated and subjected to the severe shocks of service. The increased pitch from the horizontal which the curvature provides at the lower edges assists in initiating flow upwardly in the bottoms at these edges Where the water is coolest and fewer steam bubbles are present and where circulation is therefore most sluggish. The curvature permits yielding with slight increase of curvature to compensate for and lessen the strains of expansion when heated, thus prolonging the life of the inside side sheets, the .tirebrick between the bottoms and the bottoms themselves. The heating surface is increased by the curved form. lVhen the curature upward the wheels of the locomotive have more clearance.

The operation of the invention will be clear from the above description.

Minor changes may be made in the physical embodiment of the invention within the scope of the appended claims without departing from the spirit thereof.

l. A locomotive boiler comprising, in combination, a barrel, a lircboX having water legs. a water bottom for said lirebox opening' tl'irough one of the side sheets thereof. s lfl water bottom curving upwardly and outwardly from an inner closed edge, and a. passage for water from the barrel to the water bottom opening through one of the water legs.

Q. A locomotfY ve boiler comprising. in cembination, a barrel and a tireboX having water legs, a water bottom for said lireboX connected to a side sheet thereof and communieating ith one of said water legs, said water bottom curving` upwardly and outwardly from its inner edge to its connection with said side sheet and a water passage from the barrel to said bottom providing for the flow of water from the barrel through said bottom into said leg.

A locomotive boiler comprising, in combination, a barrel and a lirebo: having water legs terminating in a mud ring, a water bottom depending below said mud ring and curving' inwa rdly and dmvnwardly below said mud ring and in communication with one of said water legs closely adjacent said mud ring, a passage for water from the barrel coimnunicating with the lower portion of said bottom providing circulation through said bottom into said leg.

L A locomotive boiler comprising. in combination. a livebox having front and side water legs. a water bottom for said lireboX connected to a side sheet thereof and communicating with one of said water legs, said water bottom curving upwardly and outwardly from its inner edge to its connection with said side sheet. and a water passage from the front leg of the lirebox to said water l'rottom.

5. An element for attachment to a side sheet of the tirebox of a locomotive boiler to provide a downward extension of a water leg thereof. comprising a hollow water carrying wall bow shaped in transverse vertical cross section, the wall having open edges llt) adapted for connection to the edges of an opening formed in said side sheet, whereby to include said element in the circulatory system of the boiler.

6. In combination with a locomotive boiler having side Vater legs terminating downwardly in a mud ring, a` water carrying element formingV a continuation of the water legs below the mud ring and comprising plates of like character as the sheets of the firebox spaced apart with stay bolts, the plates being curved in the shape of a bow in vertical transverse cross section and the space therebetween closed to provide a pressure holding vessel, and a water passage from the barrel of the boiler to said element whereby to include said element in the circulatory system of the. boiler.

7. An element for attachment to an inside side sheet of a fireboX to provide a downward extension of a water lea' thereof comprising a water table preformed to a bow shape in transverse vertical cross section, means carried by an open upper longitudinal edge of the elementfor attachment to the edges of an opening in said side sheet. and means carried by the element for attachment to a oonduit forming a portion of a passage communir-atingr with the barrel of the boiler.

8. An element for attachment to an inside side sheet of a firebox to provide a downward extension of a water leg thereof comprising a water table preformed to a bow shape in transverse vertical cross section` i means carried by an open upper longitudinal ede-'e of the element for attachment to the edges of an opening in said sheet, said means comprising' a ilange projecting angular-ly from the edge of the element and prolonged forwardly, a conduit connection carried by said prolongation and a conduit connection carried by the forward portion of the element to be placed in communication with the first named conduit connection to provide :l water passage from the barrel of the boiler through the front lower portion of the side water leg' to the element.

JESSE C. MARTIN, Jn. 

